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Snoring in twins

L Ferini-Strambi1, G Calori, A Oldani

  • 1Sleep Disorders Centre, State University, Milan, Italy.

Respiratory Medicine
|May 1, 1995
PubMed
Summary
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Habitual snoring, a precursor to obstructive sleep apnea (OSA), shows a familial link. This twin study suggests a genetic predisposition to snoring, influenced by factors like age, gender, BMI, and smoking.

Area of Science:

  • Sleep Medicine
  • Genetics
  • Epidemiology

Background:

  • Snoring is a prerequisite for obstructive sleep apnea (OSA).
  • Recent evidence supports a familial predisposition to OSA.
  • Understanding the heritability of snoring is crucial for OSA research.

Purpose of the Study:

  • To investigate the genetic and environmental influences on habitual snoring using a twin study design.
  • To determine if snoring concordance differs between monozygotic and dizygotic twins.
  • To identify factors associated with habitual snoring.

Main Methods:

  • A telephone-based interview study involving 492 monozygotic and 284 dizygotic twins.
  • Data collection included life habits, medical history, and sleep disorders, focusing on snoring.

Related Experiment Videos

  • Probandwise concordance rates and multivariate analyses were used to assess heritability and associated factors.

    • Main Results:

    • The probandwise concordance rate for habitual snoring was higher in monozygotic twins than dizygotic twins, though not significantly.
    • Habitual snoring was significantly associated with older age, male gender, higher body mass index (BMI), smoking, and respiratory diseases.
    • Multivariate analysis indicated BMI is more strongly associated with habitual snoring in dizygotic twins, while smoking and respiratory diseases were associated in dizygotic but not monozygotic pairs.

    Conclusions:

    • Findings suggest a genetic predisposition to habitual snoring.
    • Environmental factors like BMI, smoking, and respiratory diseases play a role, with varying influence based on zygosity.
    • Further research into the genetic architecture of snoring is warranted.